Global Positioning Systems (GPS or Sat Nav) are now widely available, with many new brands entering the market and the market leaders improving on already well established products. Almost all GPS receivers perform their basic primary function well and show you how to get you where you want to go, their functionality differing only in the level of detail and extra information they provide. These are not the only differences to consider but they are definitely important, here are some other factors you may wish to take into account when you are choosing a GPS:
- Maps: For vehicular travel the built in road maps are obviously the most important feature and these can vary from model to model in level of detail and additional information. Most systems allow you to download additional maps, but if you are liable to require a more detailed view of the surrounding area then a GPS receiver with advanced mapping capabilities would be a better choice than a standard model.
- Memory: A GPS unit should have adequate storage for waypoint and location information, obviously the more memory the better as with any type computer based technology. A minimum recommended guideline for memory is 8meg, although 16 or even 32 megabytes would be far better especially if you wish the GPS system to be upgradeable over time in order to keep up with the latest technology.
Reception: The larger the number of channels a GPS receiver has available the more satellite signals it will have the ability to receive at once allowing for more accurate and ultimately more reliable calculations pertaining to your position and direction. Dash board mounted receivers are more liable to receive stronger signals although the standard antenna equipped with the system may not provide adequate reception in all circumstances.- Battery Life: A GPS receiver's battery life can vary from anywhere between 15 - 24 hours, this can be reduced significantly by additional features such as illuminated screens and backlit keypads. Many units can be powered and even be recharged using the cigarette lighter socket if one is available when in a vehicle. There may also be a power saving mode to help conserve battery life.